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<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    var arr = ['张三', '李四', '王五', '赵六']

    // console.log(arr[0])
    // console.log(arr[1])
    // console.log(arr[2])
    // console.log(arr[3])

    console.log( arr.length )
    // 循环数组  遍历数组
    for(var i = 0; i < arr.length; i++) {
      console.log( arr[i] )
    }

  </script>
</body>
</html>